I got one that looks similar to that but I think I also got two different ones at the same time. One had a regular looking head and another had an odd shape with a hole but I don't think it's exactly like that. I also haven't finished so that could be part of it.

Mine are very similar... Only difference is that the stems seemed to branch more off their heads. There were still the multiple holes and disembodied limbs, though. Same color. Oh, and as I've progressed, I've noticed that their shrieks have evolved more into gurgling cries for help. They're pretty unnerving, actually.

I didn't really study them, but I noticed one with a normal human-ish head and one with a "+" shaped head. That's it, though. Bodies seemed the same (androgynous), exept I think the + guy had more "slices" taken out of him.

Mine had slightly less piecey bodies and arms, and a sort of cross-shaped head with an irregular hole throuh the middle. Later on I did actually get something similar to OP's monster, only minus the holes in the chest. Additionally, did anyone else get a fairly large list of different combinations of heads and bodies? It seems like sometimes, I'd get a crosshead with a normal body, or a basic Shock with shoulder ridges.